Keeps your hot drink at the exact temperature you prefer (between 120 degrees Fahrenheit - 145 degrees Fahrenheit). Start with 135 degrees Fahrenheit and adjust up or down.Select your personalized LED color. Capacity- 295 ml or 414 ml (US only) 1 hour battery life on a single charge. Or keep the Ember Mug on the included charging coaster for all day use. Control with your smartphone. Pair with the Ember App to set your temperature, customize presets, receive notifications and more. Safe to hand wash. Ember Mug is IPX7 rated and fully submersible up to 1 meter deep. Gen 1 No box This mug has been used. Please see photos for wear. It still works perfectly.